Results 21 to 30 of about 439 (114)

Correlation of Ergovaline and Lolitrem B Levels in Endophyte-Infected Perennial Ryegrass (Lolium Perenne) [PDF]

Journal of Veterinary Diagnostic Investigation, 2001
The varieties of perennial ryegrass ( Lolium perenne) infected with the endophytic fungus Neotiphodium lolii contain several classes of toxic alkaloids, including ergopeptide alkaloids and lolitrem alkaloids. Lolitrem B, a potent tremorgen, is generally considered to be the predominant alkaloid in endophyte-infected perennial ryegrass.
Jeannette T. Hovermale, A. Morrie Craig
openaire   +3 more sources

A Fungal Endophyte Alters Poplar Leaf Chemistry, Deters Insect Feeding and Shapes Insect Community Assembly

Ecology Letters, Volume 28, Issue 2, February 2025.
It is already known that endophytic fungi can influence plant defence against natural enemies such as herbivorous insects. However, our understanding of the underlying mechanisms is still limited. We investigated the influence of an endophytic fungus on the metabolome of poplars and the consequences for the preference and performance of herbivorous ...
Christin Walther, Marine Vallet, Michael Reichelt, Prajakta Giri, Beate Rothe, Elina J. Negwer, Pamela Medina van Berkum, Jonathan Gershenzon, Sybille B. Unsicker   +8 more
wiley   +1 more source

Ruminal motility, reticuloruminal fill, and eating patterns in steers exposed to ergovaline

Journal of Animal Science, 2019
Abstract Fescue toxicosis is problematic for growing steers, causing lower DMI and productivity when fed endophyte-infected (E+) tall fescue. A complete understanding of underlying mechanisms of how fescue toxicosis affects growing steers is lacking.
Kara Ricconi, Gyuchul Ahn, James L. Klotz, Suelen Ávila, David L. Harmon   +4 more
openaire   +4 more sources

Phosphorus fertiliser is associated with reduced grass grub (Costelytra giveni) fitness in Epichloë endophyte‐infected meadow fescue and perennial ryegrass

Pest Management Science, Volume 80, Issue 12, Page 6409-6423, December 2024.
Grass grub (Costelytra giveni) is a major agricultural pasture pest. This study demonstrated a decline in grass grub survival as soil Olsen P levels increased. Epichloë endophytes, such as the MaxR strain, provide protection under different phosphorus fertiliser regimes.
Katrin G. Hewitt, Rainer W. Hofmann, Olivier J. Ball, Dongwen Luo, Sarah C. Finch, Racheal H. Bryant, Alison J. Popay   +6 more
wiley   +1 more source

Plant and Endophyte Effect on Fiber, N, and P Concentrations in Tall Fescue

International Journal of Agronomy, Volume 2011, Issue 1, 2011., 2011
Tall fescue (Lolium arundinaceum) infected with an endophyte (Neotyphodium spp.) generally has agronomic advantages over endophyte‐free tall fescue. The objective of this study was to determine if endophyte presence (E+) or absence (E−) in three tall fescue genotypes affects concentrations of acid detergent fiber (ADF), neutral detergent fiber (NDF ...
James K. Rogers, Ben C. Morton, Jagadeesh Mosali, Robert J. Kremer   +3 more
wiley   +1 more source

The growth promotion in endophyte symbiotic plants does not penalise the resistance to herbivores and bacterial microbiota

Plant, Cell &Environment, Volume 47, Issue 8, Page 2865-2878, August 2024.
Abstract A trade‐off between growth and defence against biotic stresses is common in plants. Fungal endophytes of the genus Epichloë may relieve this trade‐off in their host grasses since they can simultaneously induce plant growth and produce antiherbivore alkaloids that circumvent the need for host defence. The Epichloë ability to decouple the growth‐
Wei Zhang, Pedro E. Gundel, Ruy Jáuregui, Stuart D. Card, Wade J. Mace, Richard D. Johnson, Daniel A. Bastías   +6 more
wiley   +1 more source

Serotonin receptor‐mediated vasorelaxation occurs primarily through 5‐HT4 activation in bovine lateral saphenous vein

Physiological Reports, Volume 12, Issue 13, July 2024.
Abstract To better understand mechanisms of serotonin‐ (5‐HT) mediated vasorelaxation, isolated lateral saphenous veins from cattle were assessed for vasoactivity using myography in response to increasing concentrations of 5‐HT or selective 5‐HT receptor agonists.
Ronald J. Trotta, David L. Harmon, James L. Klotz   +2 more
wiley   +1 more source

Stability and purity of selected ryegrass Epichloë endophytes in New Zealand dairy pastures

Grassland Research, Volume 3, Issue 2, Page 113-122, June 2024.
Ryegrass tiller sampling is performed to determine Epichloë fungal endophyte infection and strain of Epichloë, to ensure that sown selected endophytes are delivering pasture production, animal health, and productivity benefits for New Zealand dairy farmers.
David E. Hume, Dongwen Luo, Grant M. Rennie, Warren M. King, Anna L. Taylor, Marty J. Faville, Katherine N. Tozer   +6 more
wiley   +1 more source

Bovine neuronal vesicular glutamate transporter activity is inhibited by ergovaline and other ergopeptines [PDF]

Journal of Dairy Science, 2011
l-Glutamate (Glu) is a major excitatory neurotransmitter responsible for neurotransmission in the vertebrate central nervous system. Vesicular Glu transporters VGLUT1 and VGLUT2 concentrate (50mM) Glu [Michaelis constant (measuring affinity), or K(m),=1 to 4mM] into synaptic vesicles (SV) for subsequent release into the synaptic cleft of glutamatergic ...
Shengfa F Liao, James C. Matthews, J. R. Strickland, James A. Boling, Y. Xue   +4 more
openaire   +3 more sources

Interaction of ergovaline with serotonin receptor 5-HT2A in bovine ruminal and mesenteric vasculature1 [PDF]

Journal of Animal Science, 2018
Ergot alkaloids from endophyte-infected (Epichloë coenophiala) tall fescue (Lolium arundinaceum) induce vasoconstriction. Previous work has shown that serotonin receptor subtype, 5HT2A, is present in bovine ruminal (R) and mesenteric (M) vasculature, plays a role in vasoconstriction, and could be influenced by ergot alkaloids.
James L. Klotz, David L. Harmon, Ronald J Trotta   +2 more
openaire   +3 more sources